[LTP] [PATCH 0/1] Possible bug in zram on ppc64le on vfat

[Sergey Senozhatsky]

On (22/11/07 23:42), Petr Vorel wrote:
[..]
> 15859712        0        0 26214400   196608      242        0
> zram01 7 TINFO: /sys/block/zram1/mm_stat
> 15859712        0        0 26214400   196608      242        0
> zram01 7 TINFO: /sys/block/zram1/mm_stat
> 15859712        0        0 26214400   196608      242        0
> zram01 7 TINFO: /sys/block/zram1/mm_stat
> 15859712        0        0 26214400   196608      242        0
> zram01 7 TINFO: /sys/block/zram1/mm_stat
> 15859712        0        0 26214400   196608      242        0
> zram01 7 TINFO: /sys/block/zram1/mm_stat
> 15859712        0        0 26214400   196608      242        0
> zram01 7 TINFO: /sys/block/zram1/mm_stat
> 15859712        0        0 26214400   196608      242        0
> zram01 7 TBROK: "loop_read_mem_used_total /sys/block/zram1/mm_stat" timed out

Looking at mm_stat_show(), mem_used can be 0 when mm_stat_show() is
called on un-initialized device

---
...
        u64 orig_size, mem_used = 0;
        long max_used;
        ssize_t ret;

        memset(&pool_stats, 0x00, sizeof(struct zs_pool_stats));

        down_read(&zram->init_lock);
        if (init_done(zram)) {
                mem_used = zs_get_total_pages(zram->mem_pool);
                zs_pool_stats(zram->mem_pool, &pool_stats);
        }
...
---

Can you check if init_done() returns true in your tests?